SSD1882(2001) Ver la hoja de datos (PDF) - Solomon Systech

Número de pieza

componentes Descripción

Fabricante

SSD1882
(Rev.:2001)

MLA ROW (COMMON) DRIVER

Solomon Systech  

FUNCTIONAL BLOCK DESCRIPTIONS

Controller and Data Register

Based on the input signal of FR, F1, F2 and LP, this Controller will generate signals to control the Data Register. Then, the Data

Register will latch the data to the Common Cell Level Shifter according to the signals from the Controller and the data from the Shift Reg-

ister. The data is latched to the Common Cell Level Shifter at the falling edge of LP.

Bi-directional Shift Register

This Shift Register shifts the input signals YD and CIO input according to the setting of SHL, SEL, LSEL and CSEL. When SHL is

set at “L” level, CIO1 is input and CIO2 is output. When SHL is set at “H” level, CIO1 is output and CIO2 is input. The output transition

occurs on the falling edge of LP.

Common Cell Level Shifter

This is a level interface circuit which converts the signal voltage level from a logic system level to the LCD driver system voltage level.

When DOFF is at “L” level, all common output voltage will be at VC level. When DOFF is at “H” level, the common output voltage will be

changed according to the status of input signals of FR, F1 and F2. Table 1 and Table 2 show the relationship between the common output

voltage values and the input signals FR, F1 and F2.

When DOFF = H and FR = L

F1

1

0

1

0

F2

line r

line (r + 1)

line (r + 2)

line (r + 3)

1

1

0

0

+V1 +V1 -V1 +V1

-V1 +V1 +V1 +V1

+V1 -V1 +V1 +V1

+V1 +V1 +V1 -V1

When DOFF = H and FR = H

F1

1

0

1

0

F2

line r

line (r + 1)

line (r + 2)

line (r + 3)

1

1

0

0

-V1 -V1 +V1 -V1

+V1 -V1 -V1 -V1

-V1 +V1 -V1 -V1

-V1 -V1 -V1 +V1

Table 1: Relationship between COM voltage and F1 & F2 when FR = L

Table 3 shows the relationship between line# and Common.

Table 2: Relationship between COM voltage and F1 & F2 when FR = H

Line#

r

r+1

r+2

r+3

Formula

Multiples of 4

1 + multiples of 4

2 + multiples of 4

3 + multiples of 4

Common

0, 4, 8, 12, ... , 228, 232, 236

1, 5, 9, 13, ... , 229, 233, 237

2, 6, 10, 14, ... , 230, 234, 238

3, 7, 11, 15, ... , 231, 235, 239

Table 3: Relationship between Line# and Common

SOLOMON

Rev 1.1

05/2001

SSD1882

9

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